<?php
/*
 * program:	均源
 * author:	雨中漫步 & 上善若水 & qhxin
 * email:	qhxin@qhxin.com
 * date:	2014/11/11
 * description:	又是一年双十一，不能剁手，就写点东西吧~~~~~~
 */

defined('IN_SCHOOL') or die();
/*{TranslateTagBegin}*/
class EXTEND_Smtp{
	public $smtp_port;
	public $time_out;
	public $host_name;
	public $relay_host;
	public $auth;
	public $user;
	public $pass;

	private $sock;

	public function __construct() {
		$this->time_out = 30;
		$this->host_name = 'localhost';
		$this->sock = false;
	}
	
	public function init_options($relay_host = '', $smtp_port = 25,$auth = false,$user,$pass) {
		$this->relay_host = $relay_host;
		$this->smtp_port = $smtp_port;
		$this->auth = $auth;
		$this->user = $user;
		$this->pass = $pass;
	}

	public function sendmail($to, $from, $subject = '', $body = '', $mailtype, $cc = '', $bcc = '', $additional_headers = ''){
		$mail_from = $this->get_address($this->strip_comment($from));
		$body = preg_replace("/(^(\r\n))(\\.)/", "\\1.\\3", $body);
		$header= "MIME-Version:1.0\r\n";
		if($mailtype=="HTML"){
			$header .= "Content-Type:text/html; charset=UTF-8  \r\n";
		}
		$header .= "To: ".$to."\r\n";
		if($cc != ""){
			$header .= "Cc: ".$cc."\r\n";
		}
		$header .= "From: $from<".$from.">;\r\n";
		$header .= "Subject: ".$subject."\r\n";
		$header .= $additional_headers;
		$header .= "Date: ".date("r")."\r\n";
		$header .= "X-Mailer:By Redhat (PHP/".phpversion().")\r\n";
		list($msec, $sec) = explode(" ", microtime());
		$header .= "Message-ID: <".date("YmdHis", $sec).".".($msec*1000000).".".$mail_from.">;\r\n";
		$TO = explode(",", $this->strip_comment($to));
		if ($cc != "") {
			$TO = array_merge($TO, explode(",", $this->strip_comment($cc)));
		}
		if ($bcc != "") {
			$TO = array_merge($TO, explode(",", $this->strip_comment($bcc)));
		}
		$sent = true;
		foreach ($TO as $rcpt_to) {
			$rcpt_to = $this->get_address($rcpt_to);
			if (!$this->smtp_sockopen($rcpt_to)) {
				$this->log_write("Error: Cannot send email to ".$rcpt_to."\n");
				$sent = false;
				continue;
			}
			if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) {
				$this->log_write("E-mail has been sent to <".$rcpt_to.">;\n");
			} else {
				$this->log_write("Error: Cannot send email to <".$rcpt_to.">;\n");
				$sent = false;
			}
			fclose($this->sock);
			$this->log_write("Disconnected from remote host\n");
		}
		return $sent;
	}

	//Private Functions
	private function smtp_send($helo, $from, $to, $header, $body = ''){
		if (!$this->smtp_putcmd("HELO", $helo)) {
			return $this->smtp_error("sending HELO command");
		}

		if($this->auth){
			if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))) {
				return $this->smtp_error("sending HELO command");
			}
			if (!$this->smtp_putcmd("", base64_encode($this->pass))) {
				return $this->smtp_error("sending HELO command");
			}
		}

		if (!$this->smtp_putcmd("MAIL", "FROM:<".$from.">;")) {
			return $this->smtp_error("sending MAIL FROM command");
		}
		if (!$this->smtp_putcmd("RCPT", "TO:<".$to.">;")) {
			return $this->smtp_error("sending RCPT TO command");
		}
		if (!$this->smtp_putcmd("DATA")) {
			return $this->smtp_error("sending DATA command");
		}
		if (!$this->smtp_message($header, $body)) {
			return $this->smtp_error("sending message");
		}
		if (!$this->smtp_eom()) {
			return $this->smtp_error("sending <CR>;<LF>;.<CR>;<LF>; [EOM]");
		}
		if (!$this->smtp_putcmd("QUIT")) {
			return $this->smtp_error("sending QUIT command");
		}
		return true;
	}
	private function smtp_sockopen($address){
		if ($this->relay_host == "") {
			return $this->smtp_sockopen_mx($address);
		} else {
			return $this->smtp_sockopen_relay();
		}
	}
	private function smtp_sockopen_relay(){
		$this->log_write("Trying to ".$this->relay_host.":".$this->smtp_port."\n");
		$this->sock = @fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);
		if (!($this->sock && $this->smtp_ok())) {
			$this->log_write("Error: Cannot connenct to relay host ".$this->relay_host."\n");
			$this->log_write("Error: ".$errstr." (".$errno.")\n");
			return false;
		}
		$this->log_write("Connected to relay host ".$this->relay_host."\n");
		return true;
	}
	private function smtp_sockopen_mx($address){
		$domain = preg_replace("/^.+@([^@]+)$/", "\\1", $address);
		if (!@getmxrr($domain, $MXHOSTS)) {
			$this->log_write("Error: Cannot resolve MX \"".$domain."\"\n");
			return false;
		}
		foreach ($MXHOSTS as $host) {
			$this->log_write("Trying to ".$host.":".$this->smtp_port."\n");
			$this->sock = @fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);
			if (!($this->sock && $this->smtp_ok())) {
				$this->log_write("Warning: Cannot connect to mx host ".$host."\n");
				$this->log_write("Error: ".$errstr." (".$errno.")\n");
				continue;
			}
			$this->log_write("Connected to mx host ".$host."\n");
			return true;
		}
		$this->log_write("Error: Cannot connect to any mx hosts (".implode(", ", $MXHOSTS).")\n");
		return false;
	}

	private function smtp_message($header, $body){
		fputs($this->sock, $header."\r\n".$body);
		$this->smtp_debug(">; ".str_replace("\r\n", "\n".">; ", $header."\n>; ".$body."\n>; "));
		return true;
	}
	private function smtp_eom(){
		fputs($this->sock, "\r\n.\r\n");
		$this->smtp_debug(". [EOM]\n");
		return $this->smtp_ok();
	}

	private function smtp_ok(){
		$response = str_replace("\r\n",'', fgets($this->sock, 512));
		$this->smtp_debug($response."\n");
		if (!preg_match("/^[23]/", $response)){
			fputs($this->sock, "QUIT\r\n");
			fgets($this->sock, 512);
			$this->log_write("Error: Remote host returned \"".$response."\"\n");
			return false;
		}
		return true;
	}
	private function smtp_putcmd($cmd, $arg = ''){
		if ($arg != "") {
			if($cmd=="") $cmd = $arg;
			else $cmd = $cmd." ".$arg;
		}
		fputs($this->sock, $cmd."\r\n");
		$this->smtp_debug(">; ".$cmd."\n");
		return $this->smtp_ok();
	}

	private function smtp_error($string){
		$this->log_write("Error: Error occurred while ".$string.".\n");
		return false;
	}

	private function log_write($message){
		$this->smtp_debug($message);
		$message = get_current_user()."[".getmypid()."]: ".$message;
		if(DEBUG) new Log($message);
		return true;
	}

	private function strip_comment($address){
		$comment = "/\\([^()]*\\)/";
		while(preg_match($comment, $address)){
			$address = preg_replace($comment, "", $address);
		}
		return $address;
	}

	private function get_address($address){
		$address = preg_replace("/([ \t\r\n])+/", "", $address);
		$address = preg_replace("/^.*<(.+)>;.*$/", "\\1", $address);
		return $address;
	}

	private function smtp_debug($message){
		// if($this->debug){
			// echo $message;
		// }
	}

}
/*{TranslateTagEnd}*/

?>